What is CVE-2026-13838?

CVE-2026-13838 is a medium-severity vulnerability in Google Chrome, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-06-30.

How severe is CVE-2026-13838?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Google Chrome

CVE-2026-13838

Inappropriate implementation in CSS in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

EPSS: 0.002 (13.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Google Chrome — versions 150.0.7871.47

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-13838?: CVE-2026-13838 is a medium-severity vulnerability in Google Chrome, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-06-30.
How severe is CVE-2026-13838?: Medium severity. CVSS v3 base score is 6.5 out of 10.